convert datestring to datenum problem.

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davit petraasya
davit petraasya on 30 Nov 2016
Answered: Peter Perkins on 1 Dec 2016
Does anybody know how to convert this date to number:
My date is 2016-11-22T13:12:47.320Z Now I am trying to convert it to number.
op_datetime = '2016-11-22T13:12:47.320Z';
format = 'yyyy-mm-ddTHH:MM:SS.FFFZ';
datenum(op_datetime, format)
I tryed like this above, but it is giving error.
davit petraasya
davit petraasya on 30 Nov 2016
DATENUM failed.
Error in ==> andijan at 19
date_num=datenum(op_datetime, format)
Caused by: Error using ==> dtstr2dtnummx
Failed on converting date string to date number.

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Accepted Answer

Jan on 30 Nov 2016
Edited: Jan on 30 Nov 2016
The trailing 'Z' is not recognized.
op_datetime = '2016-11-22T13:12:47.320Z';
format = 'yyyy-mm-ddTHH:MM:SS.FFF'; % No trailing 'Z'
datenum(op_datetime, format)

More Answers (1)

Peter Perkins
Peter Perkins on 1 Dec 2016
In R2014b or later, you should consider using datetimes, not datenums:
>> s = '2016-11-22T13:12:47.320Z'
s =
>> d = datetime(s,'Format','yyyy-MM-dd''T''HH:mm:ss.SSS''Z''')
d =
You might want to create the datetimes with the time zone set to UTC, and people working with timestamps that look like that often care about leap seconds:
>> d = datetime(s,'Format','yyyy-MM-dd''T''HH:mm:ss.SSSX','TimeZone','UTC')
d =
>> d = datetime(s,'TimeZone','UTCLeapSeconds')
d =

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